No model



A. LIEDBEOK.

OENTRIFUGAL APPARATUS.

APPLIUATION FILED 0O1.27, 1903.

N0 MODEL. 2 SHEETS-SHEET 1 0W: 7 WWW v AM @AMA/ PATENTED JAN. 26, 1904.

No. 750,668. VPATENTED JAN. 26, 1904. A. LIBDBEOK. GENTRIPUGAL APPARATUS.

APPLIUATION FILED OUT. 27, 1903.

N0 MODEL. 2 SHEETS- SHEET 2.

W4 J4 gwith a central tubular shaft (1. Said shaft is fit more or less accurately to the inner side of 'T0 all whom it may concern:

and protrude slightly from the outside of said we a, the inner orifices of which are. situated tionary receiver 0 for the solid particles sepaouter ends of the links.{ Over the mouth of UN ITED STATES v Patent ed January 26 1904.

PATENT ()FFICE.

ALARIK LI BECK, or sTooKHoLM, SWEDEN.

CENTFlIFUGAL APPARATUS.

SPECIFICATION forming part of Letters Patent No. 750,668, dated January .26, i904.

Application filed October 2'7, 1903.

Be it known that I, ALARIK LInDBEcK, a sub-. ject of the King of Sweden and Norway, residing at Strandvagen 43, in the city of Stock holm, in the Kingdom of Sweden, have in Vented certain new and useful Improvements in Centrifugal Apparatus for Separating 'Solids and Liquids, of which the following is a specification.

My invention relates to a centrifugal ap paratus for separating the solid and liquid constituents out of a mixture of both.

In the accompanying drawings such a centrifugal apparatus is illustrated in a partial vertical section in Figure 1. Fig. 2 illustrates an elevation of a separating-drum to be used in the apparatus; and Fig. 3 is a plan view of said drum in a section on the line at y, Fig.2.

The centrifugal apparatus consists of a drum (1, which is cylindrical at its lower end and tapering at the top (or which may be tapering in its entire height) and which is provided with a bottom 0, forming the hub of and united journaled in the frame 8 and provided with a pulley k or other means for revolving the drum from some convenient source of energy. The shaftdsurrounds another shaft f, secured to an internal drum e, along the outer side of" which runs a screw-Z), the threads of which the outer drum a. Nozzles it are inserted near the bottom in the wall of the internal drum e drum between the threads. In-the bottom 0- of the drum on is arranged a discharge-passage, or as in the present case two such passages at different distances from the axis of the drum and terminate one in'a stationary vessel q and the other in a similar vessel 1'. At the upper edge of the drum is located a starated. 7

g isa bearing for the shaft 0?, which bearing during the rotation is balanced, for in-' stance, by means of links .2 andrubberbuffers'z', arranged between the frame 8 and the liquid or at the drum is located a container 2, from which Serial 1W0. 178,701. (No model.)

the mixturetofbe treated is fed down into the;

drum '6. Inthe thread or threads of the screw 6' a plate or partition Q) is inserted,- which reaches to the bottom of the thread and 'prevents the lighter liquid collected there fro rising higher. v 1

The drum a is brought into a-rotating move ment by'means of the pulley, and simultane ously the drum e is rotated at a difierent velocity by some suitable means, so that the two drums run at unequal speeds.

The mixture of'solid and liquid particles fed down to the interior of the drum (5 from thecontainer t is ejected by the influence of the centrifugal force throughthe nozzles k between the threads of the screw 6. The heavier solid particles being here separated from the liquid and congregating at the inner side of the outer drum a, as indicated in Fig. 1, are conveyed by the rotating screw to .the upper edge of this drum and, further, to the receiver 0. 'In the course of this movement, and

more especially at the tapering part of the drum, the liquid particles adhering to the. solid particles are quickly drained off, so that the mass passing into the receiver 0 will be very dry. The liquid separated, if consisting of a mixture of two liquids, so arranges itself that the heavier one extends nearer the periphery of the drum' in a layer, ,the thickness of which will be determined by the location of the orifice of the passage 71. in the drum,through which passage the said liquid discharges into the vessel 1'. Thelighter liquid, on the other hand, collects inside of the heavierlayer of the bottom ofthe screw-threads and is discharged into the vessel g through the passage m,

The partition 2:, mentioned above to be inserted in the threads, is intended I to prevent or impede the upwardmovement of the lighter liquid. 4 7 I I am aware hat centrifugal apparatus for separating liquids, and solids are previously known, but that in these the separation 18 effected by straining off the liquid during the centrifugal process through a perforated wall or filter arranged in the drum, which separa tion evidently cannot be very complete, while .at the same time such a procedure does not admit of a separation of the liquid constituents themselves if a compound liquid be treated; In the present centrifugal apparatus both the liquids, if several ofdiflerent specific gravities be dealt with, and the solid are separated, the latter being lifted by the screw out of the liquid and conveyed upward to be drained of accompanying liquid at the upper portion of the drum. The upwardly-contracting shape of the drum and the screw is essential to the present apparatus, since only hereby an almost complete separation of the liquid and solid particles can be accomplished.

Having now particularly described and as certained the nature of my said invention and in what manner the same is to be performed,

I declare that what I claim is In a centrifugal apparatus for separating solids and liquids, the combination of an up- I Wardly-tapering outer drum a, an inner drum 1 6, having on its outside one or more screwthreads I) fitting closely to the inner side of the outer drum, discharge-apertures harranged near the bottom of the inner drum, between the threads, and outlets mm for liquid, located in the bottom of the outer drum at different distances from the center, all for the purpose that the space between the outer and inner drums may form a vessel or separating-chamher where the mixture will be subjected to the action of the centrifugal force for a compara tively long period and the separation consequently become as complete as possible.

In witness whereof I have hereunto set my.

hand in presence of two Witnesses.

ALARIK LIEDBEOK. Witnesses:

H. TELANDER, T. RISBERG. 

